fix Python mockito to 1.3.0

[vladak]

Recently the Python tests started failing in test_headers_timeout_requests() because of:

>       if r.status_code == 202:
E       AttributeError: 'Dummy' has no attribute 'status_code' configured

This change should address that by fixing mockito to 1.3.0 which worked:

>>> import requests
>>> from mockito import mock
>>> m = mock(spec=requests.Response)
>>> m.__
m.__call__(           m.__dir__(            m.__ge__(             m.__hash__(           m.__lt__(             m.__reduce__(         m.__sizeof__(         
m.__class__(          m.__doc__             m.__getattr__(        m.__init__(           m.__module__          m.__reduce_ex__(      m.__str__(            
m.__delattr__(        m.__eq__(             m.__getattribute__(   m.__init_subclass__(  m.__ne__(             m.__repr__(           m.__subclasshook__(   
m.__dict__            m.__format__(         m.__gt__(             m.__le__(             m.__new__(            m.__setattr__(        m.__weakref__         
>>> m.__dict__
{}
>>> m.status_code
functools.partial(<function remembered_invocation_builder at 0x107096790>, <mockito.mocking.Mock object at 0x1063ebe80>, 'status_code')
>>> 

In 1.3.2 there was some change:

>>> from mockito import mock
>>> import requests
>>> m = mock(spec=requests.Response)
>>> m.status_code
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/private/tmp/venv/lib/python3.9/site-packages/mockito/mocking.py", line 289, in __getattr__
    raise AttributeError(
AttributeError: 'Dummy' has no attribute 'status_code' configured